Diamond DA 42 NG, Maintenance Manual

Page: 585 / 2339

AIRCRAFT
DA 42 NG AMM Communications
Doc # 7.02.15
Rev. 4
23-50-00
Page 5
15 Mar 2018
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Crew mode. Crew mode is selected when both the PILOT and COPLT keys are annunciated.
In crew mode both the pilot and co-pilot can hear the selected radios and communicate with
each other.
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All mode. All mode is selected when neither the PILOT or COPLT keys are annunciated. In all
mode both the pilots and the passengers can hear the selected radios and are able to
communicate with each other.
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VOLUME/SQ knob. This knob has 2 functions depending on the selection of the MAN SQ key.
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MAN SQ key deselected. When the MAN SQ key is deselected the ICS squelch levels are set
automatically. The VOLUME/SQ knob acts as a volume control and the VOL caption to the
lower left of the knob illuminates. Rotate the inner knob clockwise to increase the volume level
of the pilot’s ICS and rotate the inner knob counterclockwise to reduce the volume of the pilot's
ICS. Rotate the outer knob clockwise to increase the volume level of the co-pilot’s and
passengers' ICS. Rotate the outer knob counterclockwise to reduce the volume level of the
co-pilot’s and passengers’ ICS.
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MAN SQ key selected. When the MAN SQ is selected the ICS squelch levels can set manually
and pressing the VOLUME/SQ knob toggles the manual squelch ON/OFF. Manual squelch is
toggled ON when the SQ caption to the lower right of the knob illuminates. Rotate the inner knob
clockwise to increase the squelch threshold of the pilot‘s ICS and rotate the inner knob counter-
clockwise to reduce the squelch threshold of the pilots ICS. Rotate the outer knob clockwise to
increase the squelch threshold of the co-pilot's and passengers’ ICS. Rotate the outer knob
counterclockwise to reduce the squelch threshold of the co-pilot’s and passengers’ ICS.
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DISPLAY BACKUP button. Pressing the red DISPLAY BACKUP button at the bottom of the audio
control panel selects the backup mode for all the displays.